Table of Contents Zpool Administration Install ZFS on Debian GNU/Linux VDEVs RAIDZ The ZFS Intent Log (ZIL) The Adjustable Replacement Cache (ARC) Exporting and Importing Storage Pools Scrub and Resilver Getting and Setting Properties Best Practices and Caveats ZFS Administration Copy-on-write Creating Filesystems Compression and Deduplication Snapshots and Clones Sending and Receiving Filesystems ZVOLs iSCSI, […]
Table of Contents Zpool Administration Install ZFS on Debian GNU/Linux VDEVs RAIDZ The ZFS Intent Log (ZIL) The Adjustable Replacement Cache (ARC) Exporting and Importing Storage Pools Scrub and Resilver Getting and Setting Properties Best Practices and Caveats ZFS Administration Copy-on-write Creating Filesystems Compression and Deduplication Snapshots and Clones Sending and Receiving Filesystems ZVOLs iSCSI, […]
Table of Contents Zpool Administration Install ZFS on Debian GNU/Linux VDEVs RAIDZ The ZFS Intent Log (ZIL) The Adjustable Replacement Cache (ARC) Exporting and Importing Storage Pools Scrub and Resilver Getting and Setting Properties Best Practices and Caveats ZFS Administration Copy-on-write Creating Filesystems Compression and Deduplication Snapshots and Clones Sending and Receiving Filesystems ZVOLs iSCSI, […]
Table of Contents Zpool Administration Install ZFS on Debian GNU/Linux VDEVs RAIDZ The ZFS Intent Log (ZIL) The Adjustable Replacement Cache (ARC) Exporting and Importing Storage Pools Scrub and Resilver Getting and Setting Properties Best Practices and Caveats ZFS Administration Copy-on-write Creating Filesystems Compression and Deduplication Snapshots and Clones Sending and Receiving Filesystems ZVOLs iSCSI, […]
I just setup an SSD ZFS Intent Log, and the performance improvements have been massive. So much so, I need to blog about it. But first, I need to give you some background. I’m running a 2-node KVM hypervisor cluster replicating the VM images over GlusterFS (eventually over RDMA on a DDR InfiniBand link). One […]
I’ve been in the UNIX and GNU/Linux world since 1999. Back then, hard drives were barely passing double digits in GB, and RAM was PC100 speed at roughly 128 MB max. In fact, it wasn’t uncommon for most systems to have 32 MB of RAM with an 8 GB hard drive. And we ran GNOME, […]
I recently built two servers that I plan on using for a sandbox with various technologies (Infiniband, ZFS, RDMA, GlusterFS, Btrfs, Ceph, LXC, KVM, etc, etc, etc). So, getting everything installed and running, I ran into a rather interesting bug. I installed KVM and libvirt, and started rolling out some virtual machines. I wanted to […]
I always use the “-R” or “–without-recommends”, and this is why: root@yin:~# aptitude install virtinst The following NEW packages will be installed: acl{a} colord{a} consolekit{a} dconf-gsettings-backend{a} dconf-service{a} fontconfig{a} fontconfig-config{a} hicolor-icon-theme{a} libatk1.0-0{a} libatk1.0-data{a} libcairo-gobject2{a} libcairo2{a} libck-connector0{a} libcolord1{a} libcups2{a} libdatrie1{a} libdbus-glib-1-2{a} libdconf0{a} libdrm-intel1{a} libdrm-nouveau1a{a} libdrm-radeon1{a} libdrm2{a} libexif12{a} libfdt1{a} libfile-copy-recursive-perl{a} libfontconfig1{a} libgd2-xpm{a} libgdk-pixbuf2.0-0{a} libgdk-pixbuf2.0-common{a} libgl1-mesa-dri{a} libgl1-mesa-glx{a} libglapi-mesa{a} libgphoto2-2{a} […]
Table of Contents Zpool Administration Install ZFS on Debian GNU/Linux VDEVs RAIDZ The ZFS Intent Log (ZIL) The Adjustable Replacement Cache (ARC) Exporting and Importing Storage Pools Scrub and Resilver Getting and Setting Properties Best Practices and Caveats ZFS Administration Copy-on-write Creating Filesystems Compression and Deduplication Snapshots and Clones Sending and Receiving Filesystems ZVOLs iSCSI, […]
If you’re not using NetworkManager or Wicd, or some other similar tool to automatically manage your network interfaces for you, this post is for you. In the Debian world, you have a single file that manages your network interfaces. It can manage VLANs, bonded interfaces, virtual interfaces and more. You can establish rules on what […]
I created a Debian package for Salt, doing my best to adhere to the Debian Policy. You can find it at http://mentors.debian.net/package/salt. If you’re not familiar with Salt, head over to http://saltstack.org and check it out. From the author’s website: Salt is a powerful remote execution manager that can be used to administer servers in […]
Too often, I see the recommendation on forums, IRC, and elsewhere across the internet to use improper tools for creating ISO images. For example, consider the following two commands, both of which are not the correct way to build a CD/DVD image: $ dd if=/dev/scd0 of=cdimage.iso # NO! Or worse yet: $ cat /dev/scd0 > […]
This post comes from BashFAQ/081 on Greg’s Wiki. He argues why you should not be using which(1) to determine if a command is in your $PATH at the end of the page. I’ll put that argument at the front: The command which(1) (which is often a csh script, although sometimes a compiled binary) is not […]
Our family has been tasked with drawing a picture for each letter of the alphabet in an alphabet book for my soon-to-be-born niece. The letter ‘d’ was available, so it was obvious to me what should be drawn. I know when she starts flipping through the pages of the book, she will love this page […]
Quick post, outlining what I think makes the Unix family of operating systems superior, including “unix-like” operating systems such as GNU/Linux, BSD, and others. Of course, the list isn’t exhaustive- it’s just something I threw together in 10 minutes. The motivation of the post was a discussion in ##unix on Freenode. The command line interface. […]
